package com.atguigu.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Slf4j
@Component
public class RtGlobalFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        long startTime = System.currentTimeMillis();
        log.info("请求:【{}】开始时间：{}",request.getURI(),startTime);
        // ================================ 前置过滤器 =======================

        return chain.filter(exchange)
        .doFinally(signalType -> {
            // ================================ 后置过滤器 =======================
            long endTime = System.currentTimeMillis();
            log.info("请求:【{}】结束时间：{}",request.getURI(),endTime);
            log.info("请求:【{}】耗时：{}",request.getURI(),endTime-startTime);
        });
    }

    @Override
    public int getOrder() {
        return -1;
    }
}
